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Bigtable connector compatible with HBase 2.x. It uses hbase-shaded-client and exposes unshaded bigtable-client-core. Its meant to be used in standalone applications and apache beam. Please use bigtable-hbase-2.x-hadoop for hadoop classpath compatible applications.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.hadoop.hbase.client;

import java.io.Closeable;
import java.util.concurrent.CompletableFuture;
import org.apache.hadoop.hbase.RegionLocations;
import org.apache.hadoop.hbase.ServerName;
import org.apache.yetus.audience.InterfaceAudience;

/**
 * Implementations hold cluster information such as this cluster's id, location of hbase:meta, etc..
 * Internal use only.
 */
@InterfaceAudience.Private
interface AsyncRegistry extends Closeable {

  /** Get the location of meta region. */
  CompletableFuture getMetaRegionLocation();

  /**
   * Should only be called once.
   *
   * The upper layer should store this value somewhere as it will not be change any more.
   */
  CompletableFuture getClusterId();

  /** Get the address of HMaster. */
  CompletableFuture getMasterAddress();

  /** Closes this instance and releases any system resources associated with it */
  @Override
  void close();
}